What is the practical use of astable multivibrator?

Answer 1

it can be used any where, where we need the clock pulse train of low frequancy.

like a function generator contains.
astable multivibrator is used to produce waveforms
as Astable means the circuit is not set to one state or the other but rather oscillates between those states. Therefore the application is signal generation

Answer 2

Multivibrators find applications in a variety of systems where square waves or timed intervals are required. For example, before the advent of low-cost integrated circuits, chains of multivibrators found use as frequency dividers. A free-running multivibrator with a frequency of one-half to one-tenth of the reference frequency would accurately lock to the reference frequency. This technique was used in early electronic organs, to keep notes of different octaves accurately in tune. Other applications included early television systems, where the various line and frame frequencies were kept synchronized by pulses included in the video signal.

Answer 3

Where only one pulse operation is required

Answer 4

Outdoor motion lights

Answer 5

invertor